Solve the problem.The Family Fine Arts Center charges $20 per adult and $11 per senior citizen for its performances. On a recent weekend evening when 514 people paid admission, the total receipts were $7175. How many who paid were senior citizens?
A. 345 senior citizens
B. 259 senior citizens
C. 169 senior citizens
D. 255 senior citizens
Answer: A
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Solve.A brick wall 16 m by 34 m is 0.52 m thick. Under particular temperature conditions, the rate of heat flow through the wall, in calories per second is given by the expression 
. Calculate the value of this quantity to the nearest tenth.
A. 16.2 calories per second B. 6.8 calories per second C. 4.8 calories per second D. 17.8 calories per second
Solve the problem.The amount of a certain radioactive isotope present at time t is given by 
grams, where t is the time in years that the isotope decays. The initial amount present is 400 grams. How many grams remain after 20 years? Round to the nearest hundredth.
A. 379.25 g B. 397.87 g C. 234.78 g D. 681.48 g
Solve the compound inequality.6x + 7 ? 3 and 3x - 4 < 6
A. x ? - 
or x > 
B. - 
? x < 
C. - 
? x < 
D. No solution
Add or subtract. Then simplify by collecting like radical terms, if possible.7 
+ 3 
A. -4 
B. 10 
C. 10 
D. 10 